Clamp



FIG. 1 is a front/side elevational perspective view of the clamp;

FIG. 2 is a first side view of the clamp;

FIG. 3 is a second side view of the clamp;

FIG. 4 is a rear view of the clamp;

FIG. 5 is a front view of the clamp;

FIG. 6 is a bottom view of the clamp; and,

FIG. 7 is a top view of the clamp.

The broken lines in the figures represent portions of the clamp that form no part of the claim design. 

CLAIM The ornamental design for a clamp, as shown and described. 